The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Wayne Hayes - One of the best experts on this subject based on the ideXlab platform.
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a self repairing supramolecular Polymer System healability as a consequence of donor acceptor π π stacking interactions
Chemical Communications, 2009Co-Authors: Stefano Burattini, Barnaby W. Greenland, Wayne Hayes, Howard M. Colquhoun, Justin D Fox, Donia Friedmann, Peter J F Harris, Michael E Mackay, Stuart J RowanAbstract:A novel supramolecular Polymer System, in which the terminal pyrenyl groups of a polyamide intercalate into the chain-folds of a polyimide via electronically-complementary π–π stacking, shows both enhanced mechanical properties relative to those of its individual components and facile healing characteristics as a result of the thermoreversibility of non-covalent interactions.
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a novel self healing supramolecular Polymer System
Faraday Discussions, 2009Co-Authors: Stefano Burattini, Barnaby W. Greenland, Howard M. Colquhoun, Wayne HayesAbstract:Utilising supramolecular π–π stacking interactions to drive miscibility in two-component Polymer blends offers a novel approach to producing materials with unique properties. We report in this paper the preparation of a supramolecular Polymer network that exploits this principle. A low molecular weight polydiimide which contains multiple π-electron-poor receptor sites along its backbone forms homogeneous films with a siloxane Polymer that features π-electron-rich pyrenyl end-groups. Compatibility results from a complexation process that involves chain-folding of the polydiimide to create an optimum binding site for the π-electron-rich chain ends of the polysiloxane. These complementary π-electron-rich and -poor receptors exhibit rapid and reversible complexation behaviour in solution, and healable characteristics in the solid state in response to temperature. A mechanism is proposed for this thermoreversible healing behaviour that involves disruption of the intermolecular π–π stacking cross-links as the temperature of the supramolecular film is increased. The low Tgsiloxane component can then flow and as the temperature of the blend is decreased, π–π stacking interactions drive formation of a new network and so lead to good damage-recovery characteristics of the two-component blend.
Stefano Burattini - One of the best experts on this subject based on the ideXlab platform.
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a self repairing supramolecular Polymer System healability as a consequence of donor acceptor π π stacking interactions
Chemical Communications, 2009Co-Authors: Stefano Burattini, Barnaby W. Greenland, Wayne Hayes, Howard M. Colquhoun, Justin D Fox, Donia Friedmann, Peter J F Harris, Michael E Mackay, Stuart J RowanAbstract:A novel supramolecular Polymer System, in which the terminal pyrenyl groups of a polyamide intercalate into the chain-folds of a polyimide via electronically-complementary π–π stacking, shows both enhanced mechanical properties relative to those of its individual components and facile healing characteristics as a result of the thermoreversibility of non-covalent interactions.
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a novel self healing supramolecular Polymer System
Faraday Discussions, 2009Co-Authors: Stefano Burattini, Barnaby W. Greenland, Howard M. Colquhoun, Wayne HayesAbstract:Utilising supramolecular π–π stacking interactions to drive miscibility in two-component Polymer blends offers a novel approach to producing materials with unique properties. We report in this paper the preparation of a supramolecular Polymer network that exploits this principle. A low molecular weight polydiimide which contains multiple π-electron-poor receptor sites along its backbone forms homogeneous films with a siloxane Polymer that features π-electron-rich pyrenyl end-groups. Compatibility results from a complexation process that involves chain-folding of the polydiimide to create an optimum binding site for the π-electron-rich chain ends of the polysiloxane. These complementary π-electron-rich and -poor receptors exhibit rapid and reversible complexation behaviour in solution, and healable characteristics in the solid state in response to temperature. A mechanism is proposed for this thermoreversible healing behaviour that involves disruption of the intermolecular π–π stacking cross-links as the temperature of the supramolecular film is increased. The low Tgsiloxane component can then flow and as the temperature of the blend is decreased, π–π stacking interactions drive formation of a new network and so lead to good damage-recovery characteristics of the two-component blend.
Michael J Monteiro - One of the best experts on this subject based on the ideXlab platform.
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an influenza virus inspired Polymer System for the timed release of sirna
Nature Communications, 2013Co-Authors: Nghia P Truong, Indira Prasadam, Zhongfan Jia, Ross Crawford, Yin Xiao, Michael J MonteiroAbstract:Small interfering RNA silences specific genes by interfering with mRNA translation, and acts to modulate or inhibit specific biological pathways; a therapy that holds great promise in the cure of many diseases. However, the naked small interfering RNA is susceptible to degradation by plasma and tissue nucleases and due to its negative charge unable to cross the cell membrane. Here we report a new Polymer carrier designed to mimic the influenza virus escape mechanism from the endosome, followed by a timed release of the small interfering RNA in the cytosol through a self-catalyzed Polymer degradation process. Our Polymer changes to a negatively charged and non-toxic Polymer after the release of small interfering RNA, presenting potential for multiple repeat doses and long-term treatment of diseases.
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an influenza virus inspired Polymer System for the timed release of sirna
Institute of Health and Biomedical Innovation; Science & Engineering Faculty, 2013Co-Authors: Nghia P Truong, Indira Prasadam, Zhongfan Jia, Ross Crawford, Yin Xiao, Michael J MonteiroAbstract:This article is free to read on the publisher's website Small interfering RNA silences specific genes by interfering with mRNA translation, and acts to modulate or inhibit specific biological pathways; a therapy that holds great promise in the cure of many diseases. However, the naked small interfering RNA is susceptible to degradation by plasma and tissue nucleases and due to its negative charge unable to cross the cell membrane. Here we report a new Polymer carrier designed to mimic the influenza virus escape mechanism from the endosome, followed by a timed release of the small interfering RNA in the cytosol through a self-catalyzed Polymer degradation process. Our Polymer changes to a negatively charged and non-toxic Polymer after the release of small interfering RNA, presenting potential for multiple repeat doses and long-term treatment of diseases.
Suresh Chand - One of the best experts on this subject based on the ideXlab platform.
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Polymer Polymer forster resonance energy transfer significantly boosts the power conversion efficiency of bulk heterojunction solar cells
Advanced Materials, 2015Co-Authors: Vinay Gupta, Vishal Bharti, Mahesh Kumar, Suresh ChandAbstract:: Optically resonant donor Polymers can exploit a wider range of the solar spectrum effectively without a complicated tandem design in an organic solar cell. Ultrafast Forster resonance energy transfer (FRET) in a Polymer-Polymer System that significantly improves the power conversion efficiency in bulk heterojunction Polymer solar cells from 6.8% to 8.9% is demonstrated, thus paving the way to achieving 15% efficient solar cells.
Vinay Gupta - One of the best experts on this subject based on the ideXlab platform.
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Polymer Polymer forster resonance energy transfer significantly boosts the power conversion efficiency of bulk heterojunction solar cells
Advanced Materials, 2015Co-Authors: Vinay Gupta, Vishal Bharti, Mahesh Kumar, Suresh ChandAbstract:: Optically resonant donor Polymers can exploit a wider range of the solar spectrum effectively without a complicated tandem design in an organic solar cell. Ultrafast Forster resonance energy transfer (FRET) in a Polymer-Polymer System that significantly improves the power conversion efficiency in bulk heterojunction Polymer solar cells from 6.8% to 8.9% is demonstrated, thus paving the way to achieving 15% efficient solar cells.